Calking and glazing gun



Patented Oct. 3, 1933 UNITED sTA This invention relates-to a calking and glazing gun and has for its object to provide, in a manner as hereinafter set forth, a gun "of suchclass so constructed and arranged for expeditiously and satisfactorily oalking and glazing by air-pressure storedwithin the device, and further to overcome the use and inconvenience caused by the carrying, dragging or tangling of 'a hose attached to andfnow generally employed for supplying air pressure to devices of the class to which the applicants invention belongs.

A further object of the invention is to provide, inamanner as hereinafter set forth, a glazing and'calking gun having'lneans for automatically discontinuing the operation thereof when exhausted ofthe material which is to be expelled therefrom. i 1 I A furtherobject of the invention isto provide, in a manner'as hereinafter set 'forth, a calking and glazing gun having means for regulating the flow of the material expelled therefrom, as well as further providing for uniform flow of the material being expelled.

A further object of the inventionis to provide, in a manner ashereinafter set forth, a calking and glazing gun with means foreliminating popping and escaping air at the outlet end of the gun during the operation of the latter and which results in an even flow of the material which is being expelled from the gun during the calking and. glazing operation.

Further objects of the inventionare to. provide, in a manner as hereinafter set forth,..a calking and glazing gun which is simple in its construc tion and arrangement, strong, durable, compact, thoroughly'efiicient in its use, conveniently vopi 'erated, readily. assembled, and inexpensive to manufacture.

With the foregoing andother objects in view, the invention consists'of thenovel construction, combination andv arrangement of parts as here-. inafter more specifically described, and illustrated inthe accompanying'drawingwherein is shown T anlembodiment of the inventiombut it is .to be understood that changes, variations and modifi-v cationscan be resorted towhich fallwithinthe.

Figure 2 is a perspective view of the feed pipe. 7

12. 'The-stem 13 extends through sleeve '10 and has the-valve 12 fixed thereto intermediate the Figure 3 is a perspective view of one of the sec:

tions of the expelling piston rest. V

'Figure 4' is a fragmentaryvie'w in top plan.

Referring to the drawing, the gun includes a barrel formed of a cylindrical body part 1 havinga removable head 2 at one end and a fixed head 3 at its other end. The body part 1 at one end is formed withperipheral threads 4'. The head 2 consists of a cylindrical part 5, a tapered I part fiand'a contracted part 7., The part 5 has 4 for detachably securing the head 2;to the body part, L The part 7 of-head 2 is of materially less'width than the'part 5. The part6 is inter posed betweenthe parts 5 and 7. #The outer end of part 17 is beveled downwardly from its front wall to its rear wall to provide the latter ofless throughout from front to -rear. The head 3 has an axial. opening9 and registering therewith is a sleeve 10" arranged within "the bodypart land formed with ,a valve seat ll for-an outletvalve ends thereof; Guide eans 14 are arranged within "sleeve 110;.for a portion of the'stem 13.

A- guide means 15 is also arranged; within the sleeve 10 atthe inner end thereof for stem- 13. Interposed between the guidefrneans 15 and the Valve 12 and surrounding the stem 13 is fa controlling spring 16' for valve 12which normally acts to maintain valve. 12 against the seat 11. The stem 13 projects from the inner sleeve 10 and is formed with an eye 17.

I The body part 1 has securedtherein interme diate the ends thereof a' pistonrest l8"formed of two abutting sectionsand of annular' form.

the chamber 21 above thlatter. Carriedby the 100 body part 1 is a normally closed air inlet valve device 22 adapted to beconnected to a source; of compressed air supply to provide for the supplying of compressedair to'the chamber 29." The air pressure 'contained'in the gun will befrom 105 one hundred pounds per square seventy-five to inch.

23 provided with a packing 24 which rides against the inner faceof body part 1. Adjustably con- 1 1 0 internal threads 8 which engage withthe threads 7 Operating within the chamber 21 is a piston nected with the piston 23 is an eye bolt 25 carrying' a flexible member or chain 26 which is at- .1. The handle member 28 is also coupled to the body part 1 by an angle shaped coupling strap 29 which has one terminal thereof secured to body part 1 and its other terminal'secured to the lower'portion of handle member 28.

Fixedly secured to the end 8 of part 7 of the head 2 and disposed at an upwardly inclination from rear to front is a feeder pipe 30 having peripheral threads 31 at one end thereof and formed intermediate its ends with an oval shaped opening 32 in its lower portion providing a restricted outletfor the chamber 21. The pipe 30 projects laterally in both directions from the part 7 of head .2 and has detachably connected to the threaded ends thereof a tip 33 of the de sired length. Ihe tip 33 hasa beveled outer end 34. Slidably mounted on the pipe 30 is, an adjustable'tensioning member 35. The adjusting means for the member 35 consists of a screw 36 extending through and threadedly engaging with a lug 37 on pipe 30. The screw 36 engages in a socket, 38 formed in the tensioning member 35. Projecting from the top of thepipe 30, in proximity to its other end is an apertured lug 39 which constitutes a stop for a purposeto be presentlyreferred to. 7

. Slidably mounted in the pipe 30 is ,a tubular trigger 40 having a beveled inner end 41. .The trigger 40 projects from therear end of the pipe 30 and is formed with a peripheral shoulder 42 adap ed to, abut against the edge at the lower end of pipe 30 to arrest the shifting movement of the trigger towards pipe.30. The outer end of trigger 40 is closed, as, indicated M42 and carries a depending; finger piece 43'. Attached to each side of the-outer end 42 of the trigger 40 is a controlling spring, 43 therefor and the said springs 43 have their upper ends attached to thetensioning member 35. The length of -the trigger 40 is such that it will normally extend across and close the opening 32 and pipe 30 to the barrel. The springs 43function to maintain the trigger in position thus referred to. Carried by the trigger 4G and. extending through the-lug 39 is a trigger guide bar 44carryin'gan abutment nut 45coacting withthe lug 39 for limiting the outward, pull of trigger 40. The nut 45 adjustably engages with the bar 44 to control in connection with lug 39 the extent of the outward pull of the trigger tovary the size of opening 30 for controlling the fiow of the material to be expelled from the barrel and also to provide for a uniform flow. The lug 39- inconnection with the bar 44 prevents the rotative movement of the trigger 7 relative to the feeder pipe.

After the'material has been. supplied to the chamber 21 andwith the piston 23 seated on the rest 18 the necessary amount of air pressure'is supplied to .the chamber 20.' By pulling the trigger away from the pipe 30 to open the gun to the latter, the air pressure will permit of I acting to shift the piston in a direction to. expel the material from the body part 1, through the opening 32, into the pipe 30 and out through the tip 33 to the point of utilization. The expelling action will be arrested when the piston 23 moves to an extent to have member 26 shift the valve 12 to open position. Y

The controlling springs 43 are adjusted by the screw 36, acting on the member 35 to shift the same forwardly on the pipe 30 or due to the action of the springs moving the member 35 towards the screw 36.

As the pipe 30 is provided with means for detachably securing the tip in position, it is obvious that various lengths of tips can be employed or coupled in position with respect to pipe 30. The grooved handle 28 enables the device to be gripped bythe operator in a satisfactory manner to prevent slipping from the hand of, the operator, due to the fact that the operators fingers will seat in the grooved portion of the member 28.

What I claim is:

1. In a calking and glazing gun, the combination of a barrel from which the material to'be used is expelled, a head for one end of the barrel andformed with a hollow contracted part providing an outlet for the barrel,-the outer end of said part inclining downwardly from front to rear, an inclined nozzle feeder pipe secured intermediate its ends to the top of and formed with an intake permanently communicating with said part, a shiftable tubulartrigger slidably mounted in and extending rearwardly from said pipe, said trigger having a lengthwise portion of its lower face extendingacross said intake for normally closing the intake, an adjustable tensioning member mounted on the pipe, controlling springs attached to said member and to the rear end of the trigger, said barrel and trigger having coacting parts providing a combined stop and guide means for thetrigger for controlling the extent of the outward pull of the latter and to prevent ,rotative movement of the trigger relative to the pipe, and said means including a pair of parts, one adjus able relative to the other for varying the extent of the rearward pull of the trigger.

2.,In a calking' and glazing gun of that type including a barrel from which the material to be used is expelled andwith the barrel having an outlet, the combination of a nozzle feed pipe extending across and having an intake opening intermediate its ends registering with said ou extending guide carried by the triggerand slidably extending through the other of said lugs and provided with an abutment for arresting the rearward pull of the trigger. r

. v MARSHALL M. CARSON.

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